History Trivia / TwentyOneJumpStreet

* MoneyDearBoy: Creator/JohnnyDepp didn't want to do the series, but he signed on for both the money and the chance to work with Frederic Forrest.

* CareerResurrection: Music/IceCube seems to have found his niche as a comedic AngryBlackMan after a string of flops and unremarkable films.

* BadExportForYou: Inverted. All but the German-export [=DVDs=] suffer from terrible ClumsyCopyrightCensorship, with missing music and scenes; only the German release features the original music track and entire show.

* PlayingAgainstType: Many watchers of the episode "The Education of Terry Carver" got a ''hell'' of a shock when Jonathon Crombie (who at the time, and right up until Series/AnneWithAnE came out decades later, was the definitive image for the one and only [[Literature/AnneOfGreenGables Gilbert Blythe]]) suddenly pulled a knife and raped the title character.

* ThrowItIn: Ice Cube improvised many of his lines.

* CaliforniaDoubling: Though supposedly set in the U.S., the fact that ''21 Jump Street'' is shot in Canada is made clear by the fact that the extras were hired locally and thus do decidedly non-US things like say "grade 3" instead of "3rd grade" and write graffiti with words ending in "-our" instead of "-or". The only slightly blurred "Beautiful British Columbia" license plates are also a dead giveaway. Though when a license plate is clearly visible, it says "Beautiful Evergreen State", which is the Washington state nickname, but with the British Columbia plate design.

* ThrowItIn: The tattoo Hanson gets on his arm in "Fear and Loathing with Russell Buckins" is the actual tattoo his actor Johnny Depp already had (an American Indian Chief, in tribute to his part-Cherokee heritage).
* UnintentionalPeriodPiece: The series is ''extremely'' 80's, not just with everybody's [[EightiesHair hair]] and clothes, but with the social issues it addressed, and how it depicted society--it's a clear picture of what the 80's were like.

* PlayingAgainstType: Many watchers of the episode "The Education of Terry Carver" got a ''hell'' of a shock when Jonathon Crombie (who both then and now is the definitive image for the one and only [[Literature/AnneOfGreenGables Gilbert Blythe]]) suddenly pulled a knife and raped the title character.

* ThrowItIn: The tattoo Hanson gets on his arm in "Fear and Loathing with Russell Buckins" is the actual tattoo his actor Johnny Depp already had (an American Indian Chief).

** Lochlyn (Rick) Munro played different characters in multiple episodes.

* TooSoon: In the DVDCommentary, it is mentioned that the line "Doing cocaine with Music/WillieNelson's horse" was originally "Doing cocaine with Music/WhitneyHouston's niece." This was changed because of Houston's death shortly before the editing of the movie was supposed to be finished, and at the last minute they had to call the actor to come in and dub over a new line.

* TooSoon: In the DVDCommentary, it is mentioned that the line "Doing cocaine with Willie Nelson's horse" was originally "Doing cocaine with Whitney Houston's niece." This was changed because of Houston's death shortly before the editing of the movie was supposed to be finished, and at the last minute they had to call the actor to come in and dub over a new line.

* WhatCouldHaveBeen: Creator/JoshBrolin was considered for Tom Hanson. He would later make a guest appearance.

* ActorAllusion: This time Jonah Hill has a good laugh at how [[Film/{{Superbad}} he'll have no problem getting booze.]]

* TooSoon: In the audio commentary, it is mentioned that the line "Doing cocaine with Willie Nelson's horse" was originally "Doing cocaine with Whitney Houston's niece." This was changed because of Houston's death shortly before the editing of the movie was supposed to be finished, and at the last minute they had to call the actor to come in and dub over a new line.

* DawsonCasting: Although the movie parodies this with Creator/JonahHill (29) and Creator/ChanningTatum (32) trying to pass for high school students, it's still played straight with the actors playing the actual high school students. Brie Larson was 22 and Dave Franco was 27, both playing 18-year-olds.